CN116082920A - Thick coating type water-based epoxy paint for storage tank and preparation method and application thereof - Google Patents

Thick coating type water-based epoxy paint for storage tank and preparation method and application thereof Download PDF

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Publication number
CN116082920A
CN116082920A CN202310103357.1A CN202310103357A CN116082920A CN 116082920 A CN116082920 A CN 116082920A CN 202310103357 A CN202310103357 A CN 202310103357A CN 116082920 A CN116082920 A CN 116082920A
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component
agent
storage tank
thick coating
based epoxy
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CN202310103357.1A
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Inventor
孟腾飞
刘芳
来媛媛
朱东
王新征
王胜辉
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Pentium Lacquer Industry Shanghai Co ltd
Shandong Puntiun Paint Co ltd
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Pentium Lacquer Industry Shanghai Co ltd
Shandong Puntiun Paint Co ltd
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Priority to CN202310103357.1A priority Critical patent/CN116082920A/en
Publication of CN116082920A publication Critical patent/CN116082920A/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/45—Anti-settling agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/001—Conductive additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to the technical field of epoxy paint, in particular to the field of IPCC09D163, and more particularly relates to a thick coating type water-based epoxy paint for a storage tank, and a preparation method and application thereof. The components comprise: a component A and a component B; the component A comprises the following components in percentage by weight: 28-43wt% of water-based epoxy resin, 0.8-2wt% of dispersing agent, 0.3-1.0wt% of defoaming agent, 0.5-1.0wt% of anti-settling agent, 0.3-0.6wt% of silane coupling agent, 0.3-0.6wt% of wetting agent, 23-42wt% of pigment, 4-8wt% of filler, 18-22wt% of conductive mica powder and the balance of cosolvent; the component B comprises the following components: 15-35wt% of aqueous epoxy curing agent, 4-10wt% of flash rust inhibitor and the balance of deionized water. The weight ratio of the aqueous epoxy resin to the pigment to the conductive mica powder is 1: (0.6-1.2): (0.5-0.8), the coating has excellent mechanical properties and can effectively improve the solid content of the coating.

Description

Thick coating type water-based epoxy paint for storage tank and preparation method and application thereof
Technical Field
The invention relates to the technical field of epoxy paint, in particular to the field of IPCC09D163, and more particularly relates to a thick coating type water-based epoxy paint for a storage tank, and a preparation method and application thereof.
Background
The epoxy resin has excellent chemical corrosion resistance and excellent adhesion to steel, and is an anti-corrosion material with excellent performance. In the construction process of the anticorrosive paint on the inner wall of the storage tank by using the conventional oily epoxy paint, a large amount of volatile solvent exists in the paint, and air cannot circulate, so that great damage is brought to the body of constructors, and great fire hazards exist. The waterborne epoxy oil-resistant static conductive paint gradually becomes the development direction of storage tank corrosion resistance due to the advantages of safety, environmental protection, corrosion resistance and the like. However, the existing water-based paint has lower solid content, and the film thickness is difficult to reach higher at one time, even if the film thickness is higher at one time, because the water content in the system is more, the film volatilizes slowly and sagging phenomenon is easy to generate, and meanwhile, the film density is reduced due to more dark bubbles in the film, so that the performance of the film is influenced.
CN106634410B discloses a water-based epoxy static conductive anticorrosive paint, which is prepared by the following steps: 1. premixing water and a water-based dispersing agent, adding an epoxy resin emulsion, stirring until the mixture is uniform, gradually adding talcum powder, precipitated barium sulfate, titanium pigment and bentonite, uniformly dispersing at a high speed, and grinding; and adding the rest of the aqueous epoxy resin emulsion and the conductive powder, stirring uniformly, adding the wetting agent, stirring uniformly, and gradually adding the defoaming agent, the leveling agent and the flash rust inhibitor. Adding diluted aqueous thixotropic agent, stirring uniformly, and adding water to adjust viscosity to obtain component A. 2. And diluting the aqueous epoxy curing agent with water and ethanol in proportion to obtain a component B. However, the invention still adds an organic solvent, the solid content is not high enough (61%), and thick coating cannot be realized.
Disclosure of Invention
Aiming at the defects of the existing water-based paint, the invention provides the thick-coating water-based epoxy paint for the storage tank, the preparation method and the application thereof, and the prepared paint has excellent physical property and chemical resistance, better water resistance, acid resistance and alkali resistance, better corrosion resistance and stable conductivity, and simultaneously has excellent thick coating property and improves the site construction efficiency by adjusting the proportion of components and optimizing the preparation process.
In order to achieve the purpose of the invention, the first aspect of the invention provides a thick coating type water-based epoxy paint for a storage tank, which comprises the following components: a component A and a component B;
the component A comprises the following components in percentage by weight: 28-43wt% of water-based epoxy resin, 0.8-2wt% of dispersing agent, 0.3-1.0wt% of defoaming agent, 0.5-1.0wt% of anti-settling agent, 0.3-0.6wt% of silane coupling agent, 0.3-0.6wt% of wetting agent, 23-42wt% of pigment, 4-8wt% of filler, 18-22wt% of conductive mica powder and the balance of cosolvent;
the component B comprises the following components: 15-35wt% of aqueous epoxy curing agent, 4-10wt% of flash rust inhibitor and the balance of deionized water.
The average epoxy equivalent of the aqueous epoxy resin is 400-600g/mol, and the average viscosity of the aqueous epoxy resin is 2000-14000 mPa.s.
Preferably, the average epoxy equivalent of the aqueous epoxy resin is 400-500g/mol, and the average viscosity of the aqueous epoxy resin is 3000-10000 mPa.s.
Further preferably, the aqueous epoxy resin comprises the union cure chemical group Uapoly 330, shanghai Hua Yi Fine chemical Co., ltd STW600, tin-free Hong Hui New Material technology Co., ltd AERS TM One or more of 6075M.
Preferably, the aqueous epoxy resin comprises a union curing group Uapoly 330 and Shanghai Hua Yi fine chemical industry Co., ltd. STW600, wherein the weight ratio of the Uapoly 330 to the STW600 is 1: (2-4).
Further preferably, the aqueous epoxy resin comprises a union curing group uobay 330, shanghai Hua Yi fine chemical industry Co., ltd. STW600, wherein the weight ratio of the uobay 330 to the STW600 is 1:2.5.
the dispersant comprises a nonionic dispersant
Preferably, the dispersant comprises
Figure BDA0004073940870000021
9004，/>
Figure BDA0004073940870000022
One or more of VXW 6208,Dispex Ultra PX 4522,NOVELUTION 3400.
Further preferably, the dispersant has an average viscosity of 300 to 3000 mPas.
Further preferably, the dispersant has an average viscosity of 1150 mPa.s, including Zhan Xin Chemicals
Figure BDA0004073940870000023
VXW 6208。
The defoamer comprises BYK-011, BYK-022, BYK-024,
Figure BDA0004073940870000024
Airex 901W,/>
Figure BDA0004073940870000025
810,
Figure BDA0004073940870000026
One or more of Airex 902W.
Preferably, the defoamer comprises BYK-024,
Figure BDA0004073940870000027
810，/>
Figure BDA0004073940870000028
one or more of Airex 902W.
Further preferably, the antifoaming agent comprises
Figure BDA0004073940870000029
810。
The anti-settling agent comprises one or more of silicon dioxide, organic bentonite, castor oil derivatives, polyolefin wax and N-methyl pyrrolidone solution of modified polyurea.
Preferably, the anti-settling agent comprises silicon dioxide, organic bentonite and N-methyl pyrrolidone solution of modified polyurea, wherein the weight ratio of the silicon dioxide to the organic bentonite to the N-methyl pyrrolidone solution of modified polyurea is 1: (0.3-1): (1-3).
Further preferably, the anti-settling agent comprises silicon dioxide, organic bentonite and N-methyl pyrrolidone solution of modified polyurea, wherein the weight ratio of the silicon dioxide to the organic bentonite to the N-methyl pyrrolidone solution of modified polyurea is 1:0.5:2.
preferably, the model of the organic bentonite is as follows: haiminsi SD-2, the model of the silicon dioxide is: AEROSIL R972; the model of the N-methyl pyrrolidone solution of the modified polyurea is as follows: BYK420.
Preferably, the silane coupling agent comprises an epoxy type, and the average viscosity of the silane coupling agent is 20-80 mPa.s.
Preferably, the average viscosity of the silane coupling agent is 35 mPas, brand: coatosil MP200 (Michaelp).
The wetting agent comprises
Figure BDA0004073940870000031
Wet270，/>
Figure BDA0004073940870000032
Wet 280，/>
Figure BDA0004073940870000033
Twin 4100，/>
Figure BDA0004073940870000034
One or more of the Wet KL 245.
Preferably, the wetting agent comprises
Figure BDA0004073940870000035
Wet270, available from Shanghai Sang Jing chemical Co., ltd.
The filler comprises zinc oxide, zinc phosphate and aluminum tripolyphosphate.
Preferably, the filler comprises aluminum tripolyphosphate, available from Guangxin New Crystal, model: APW-2.
Preferably, the pigment comprises one or more of rutile titanium dioxide, iron oxide black, carbon black and iron oxide red.
Further preferably, the pigment comprises rutile titanium dioxide, available from gallery creative chemical products limited.
The conductive mica powder comprises one or more of BC-C series, BC-B series, BC-D series and BC-P series of Junjiang science and technology.
Preferably, the loose packing density of the conductive mica powder is 0.3-0.5g/cm 3 。
Further preferably, the conductive mica powder has a bulk density of 0.4g/cm 3 . Including BC-C series of junjiang technology.
The applicant found that the weight ratio of the aqueous epoxy resin to the pigment to the conductive mica powder is 1: (0.6-1.2): (0.5-0.8), the coating has excellent mechanical properties and can effectively improve the solid content of the coating. With the increase of pigment, the solid content of the paint is increased, the filler plays a role of particle enhancement, the permeability and impact resistance of the coating film are increased, but with the further increase of pigment, the wear resistance, water resistance, corrosion resistance and glossiness of the coating film are gradually deteriorated, the water-based epoxy resin can not isolate and surround pigment particles, gaps exist among paint film particles, the permeation resistance of the paint film is reduced, the adhesive force is also reduced, the rust resistance of the paint film is reduced, the substrate is easy to corrode, and the research finds that the specific proportion is added and the apparent density is 0.3-0.5g/cm 3 The conductive mica powder not only can improve the static electricity conducting performance of the coating, but also can improve the adhesive force and corrosion resistance of a paint film, the addition amount of the conductive mica is too small, the volume concentration is too low, the conductive mica is separated from each other, a continuous network cannot be formed, and the coating does not conduct static electricity; with the increase of the addition amount of the conductive mica, the pigment is formed byThe bulk density is promoted to be 0.3-0.5g/cm at a larger specific surface area 3 Meanwhile, the increase of the conductive mica and the filler in a specific proportion improves the drying rate of the coating, further improves the static electricity conducting capacity of the coating, and can effectively prevent the conductive mica powder from settling due to the fact that the drying rate is increased, so that the surface mica powder distribution is increased. Further researches show that the addition of the rust-proof pigment aluminum tripolyphosphate can not only improve the corrosion resistance, but also improve the adhesive force of a paint film and enhance the impermeability of the paint film.
The anti-settling agent is added to further balance the fluidity and the workability of the coating, the fluidity of the coating is too high, and the coating film can generate the phenomena of flowing and dripping; the fluidity is too low, the paint workability is poor, and the normal construction is slow to develop. The anti-settling agent comprises silicon dioxide, organic bentonite and N-methyl pyrrolidone solution of modified polyurea, wherein the weight ratio of the silicon dioxide to the organic bentonite to the N-methyl pyrrolidone solution of modified polyurea is 1: (0.3-1): the thixotropic property and mechanical property of the coating can be improved in the process of (1-3), the dry film is coated with 150-260 mu m without sagging, the coating is particularly suitable for the construction of the inner wall coating of a petrochemical storage tank, the construction efficiency is improved, the acting force between pigment and filler is improved by the lamellar structure of montmorillonite and silicon dioxide particles in bentonite, the needle-like crystal of N-methyl pyrrolidone solution of modified polyurea forms a three-dimensional reticular structure through the bonding force between crystals, and the coating effect is realized on silicon dioxide and organic bentonite, so that the thixotropic property is further improved.
Preferably, the weight ratio of the aqueous epoxy resin to the pigment to the conductive mica powder is 1: (0.6-1.2): (0.5-0.8).
Further preferably, the weight ratio of the aqueous epoxy resin to the pigment to the conductive mica powder is 1:0.6:0.5.
the cosolvent comprises one or more of propylene glycol methyl ether, ethanol and propylene glycol methyl ether acetate.
Preferably, the cosolvent comprises propylene glycol methyl ether.
Preferably, the active hydrogen equivalent of the aqueous epoxy hardener is 130-180g/mol, and the solid content of the aqueous epoxy hardener is 50-80wt%.
Further preferably, the aqueous epoxy curing agent comprises Zhan New BECKOPOX EH 613w/80WA, tin-free Hong Hui New Material technologies Co., ltd. AERS TM 7015，
Figure BDA0004073940870000041
38-1。
Preferably, the aqueous epoxy curing agent comprises Zhan Xin BECKOPOX EH 613w/80WA, tin-free Hong Hui New Material technologies Co., ltd. AERS TM 7015 the BECKOPOX EH 613w/80WA and AERS TM 7015 weight ratio is 1: (0.3-1).
Further preferably, the aqueous epoxy curing agent comprises Zhan New BECKOPOX EH 613w/80WA, tin-free Hong Hui New Material technologies Co., ltd. AERS TM 7015 the BECKOPOX EH 613w/80WA and AERS TM 7015 weight ratio is 1:0.75.
the flash rust inhibitor comprises one or more of ANTICO ARCH100S and ANTICO ARCH 300S,ANTICO ARCH 200S,ADDITAL DMK,ADDITAL DMS of Nanjing, inc.
Preferably, the flash rust inhibitor comprises a macromolecular alkyl tertiary amine modification.
Further preferably, the flash rust inhibitor includes ANTICO ARCH100S from Highway technology (Nanjing) Inc.
Preferably, the weight ratio of the aqueous epoxy curing agent to the flash rust inhibitor is 1: (0.1-0.55).
Further preferably, the weight ratio of the aqueous epoxy curing agent to the flash rust inhibitor is 1:0.25.
preferably, the weight ratio of the component A to the component B is (2.5-5): 1.
further preferably, the weight ratio of the component A to the component B is 3.5:1.
the second aspect of the invention provides a preparation method of the thick coating type water-based epoxy paint for the storage tank, which comprises the following steps:
s1, adding part of aqueous epoxy resin into a cosolvent, dispersing at a low speed, sequentially adding a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, pigment and a silane coupling agent, uniformly stirring, and grinding to obtain a mixture 1;
s2, adding the residual water-based epoxy resin and the conductive mica powder into the mixture 1, uniformly dispersing, adding the filler, and continuously and uniformly dispersing to obtain a component A;
s3, adding the aqueous epoxy curing agent into deionized water, stirring and dispersing at a low speed, and then adding the flash rust inhibitor, and dispersing uniformly to obtain a component B;
s4, uniformly mixing the component A and the component B.
Preferably, the portion of the aqueous epoxy resin comprises 3 to 20 weight percent of the aqueous epoxy resin.
Further preferably, the portion of the aqueous epoxy resin comprises 5wt% of the aqueous epoxy resin.
Preferably, the fineness of the grinding is 20-40 μm.
Further preferably, the fineness of the grinding is 30 μm.
The third aspect of the invention provides application of the thick coating type water-based epoxy coating for the storage tank, which is applied to the inner wall of the storage tank as an anti-corrosion coating.
Preferably, the thickness of the corrosion-resistant coating is 250-350 μm.
Further preferably, the thickness of the corrosion protection coating is 300 μm.
The beneficial effects are that:
1. the weight ratio of the aqueous epoxy resin to the pigment to the conductive mica powder is 1: (0.6-1.2): (0.5-0.8), the coating has excellent mechanical properties and can effectively improve the solid content of the coating.
2. Adding specific proportion and loose density of 0.3-0.5g/cm 3 The conductive mica powder not only can improve the static electricity conducting performance of the coating, but also can improve the adhesive force and corrosion resistance of a paint film.
3. The anti-settling agent comprises silicon dioxide, organic bentonite and N-methyl pyrrolidone solution of modified polyurea, wherein the weight ratio of the silicon dioxide to the organic bentonite to the N-methyl pyrrolidone solution of modified polyurea is 1:
(0.3-1): and (1-3) the thixotropic property and mechanical property of the coating can be improved.
Detailed Description
Example 1
A thick coating type water-based epoxy paint for a storage tank comprises the following components: a component A and a component B;
the component A comprises the following components in percentage by weight: 40wt% of aqueous epoxy resin, 1wt% of dispersing agent, 0.4wt% of defoaming agent, 0.55wt% of anti-settling agent, 0.43wt% of silane coupling agent, 0.37wt% of wetting agent, 24wt% of pigment, 5wt% of filler, 20wt% of conductive mica powder and the balance of cosolvent.
The component B comprises the following components: 32wt% of aqueous epoxy curing agent, 8wt% of anti-flash rust agent and the balance of deionized water.
The waterborne epoxy resin comprises a coupled curing chemical group Uapoly 330 and a Shanghai Hua Yi fine chemical company STW600, wherein the weight ratio of the Uapoly 330 to the STW600 is 1:2.5.
the average viscosity (25 ℃) of the dispersant is 1150 mPa.s, including Zhan Xin Chemicals
Figure BDA0004073940870000061
VXW 6208。
The defoamer comprises
Figure BDA0004073940870000062
810。
The anti-settling agent comprises silicon dioxide, organic bentonite and N-methyl pyrrolidone solution of modified polyurea, wherein the weight ratio of the silicon dioxide to the organic bentonite to the N-methyl pyrrolidone solution of modified polyurea is 1:0.5:2.
the model of the organic bentonite is as follows: haiminsi SD-2, the model of the silicon dioxide is: AEROSIL R972; the model of the N-methyl pyrrolidone solution of the modified polyurea is as follows: BYK420.
The average viscosity (25 ℃) of the silane coupling agent is 35 mPas, brand: coatosil MP200 (Michaelp).
The wetting agent included TEGOWet270, available from shanghai Sang Jing chemical company, inc.
The filler comprises aluminum tripolyphosphate, and is purchased from Guangxin new crystal, model: APW-2.
The pigment comprises rutile titanium dioxide, and is purchased from gallery creating chemical products limited company.
The loose density of the conductive mica powder is 0.4g/cm 3 . Including BC-C series of junjiang technology.
The cosolvent comprises propylene glycol methyl ether.
The aqueous epoxy hardener comprises Zhan Xin BECKOPOX EH 613w/80WA, tin-free Hong Hui AERS of New Material technologies Co., ltd TM 7015 the BECKOPOX EH 613w/80WA and AERS TM 7015 weight ratio is 1:0.75.
the anti-flash rust agent includes ANTICO ARCH100S from Ministry of high technology (Nanjing).
The weight ratio of the component A to the component B is 3.5:1.
the preparation method of the thick coating type water-based epoxy paint for the storage tank comprises the following steps:
s1, adding part of aqueous epoxy resin into a cosolvent, dispersing for 5min at 500rpm, sequentially adding a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, pigment and a silane coupling agent, stirring for 10min at 500rpm, and grinding to obtain a mixture 1;
s2, adding the residual water-based epoxy resin and the conductive mica powder into the mixture 1, dispersing for 20min at 1200rpm, adding the filler, dispersing for 20min at 900rpm, performing inspection, and filtering by a 100-mesh filter screen after the inspection is qualified to obtain a component A;
s3, adding the aqueous epoxy curing agent into deionized water, dispersing for 5min at 500rpm, adding the flash rust inhibitor, and dispersing for 5min at 500rpm to obtain a component B;
s4, mixing the component A and the component B at 500rpm for 5min when in use.
The weight percentage of the partial aqueous epoxy resin is 5wt% of the aqueous epoxy resin.
The fineness of the grinding was 30 μm.
The thick coating type water-based epoxy paint for the storage tank is applied to the inner wall of the storage tank as an anti-corrosion coating.
The thickness of the anticorrosive coating is 300 μm.
Example 2
The detailed description is the same as example 1; except that the a component described in example 2 includes: 40wt% of water-based epoxy resin, 0.8wt% of dispersing agent, 0.5wt% of defoaming agent, 0.65wt% of anti-settling agent, 0.47wt% of silane coupling agent, 0.33wt% of wetting agent, 26wt% of pigment, 5wt% of filler, 18wt% of conductive mica powder and the balance of cosolvent.
Example 3
The detailed description is the same as example 1; in contrast, the aqueous epoxy resin described in example 3 includes the co-curing chemical group Uapoly 330, tin-free Hong Hui New Material technologies Co., ltd. AERS TM 6075M, said Uapoly 330 and AERS TM 6075M weight ratio is 1:3.
comparative example 1
The detailed description is the same as example 1; in contrast, the waterborne epoxy resin described in comparative example 1 includes the union cure chemistry group uinoly 330.
Comparative example 2
The detailed description is the same as example 1; in contrast, the a component described in comparative example 2 includes: 40wt% of water-based epoxy resin, 0.8wt% of dispersing agent, 0.5wt% of defoaming agent, 0.65wt% of anti-settling agent, 0.47wt% of silane coupling agent, 0.33wt% of wetting agent, 20wt% of pigment, 5wt% of filler, 24wt% of conductive mica powder and the balance of cosolvent.
Comparative example 3
The detailed description is the same as example 1; in contrast, the anti-settling agent in comparative example 3 comprises a solution of silica, organobentonite, and modified polyurea in N-methylpyrrolidone, wherein the weight ratio of the silica, organobentonite, and modified polyurea in N-methylpyrrolidone is 1:2:0.5.
performance test method
The coatings obtained in examples 1-3 and comparative examples 1-3 were subjected to performance tests, the test data being shown in Table 1.
Non-volatile content (%): refer to GB/T1725.
Surface dry time (h), real dry time (h): refer to GB/T1728.
Surface resistivity (Ω): refer to GB/T1410.
Adhesion (MPa): refer to GB/T5210.
Flexibility (mm): refer to GB/T1731.
Impact resistance (MPa): refer to GB/T1732.
Hot water resistance (90 ℃ -100 ℃,48 h): refer to GB/T1733. Meanwhile, the product is qualified after no foaming, no rusting, no cracking and no falling off, and otherwise, the product is unqualified.
Gasoline resistance (60 ℃ + -2 ℃ C., 720 h): reference is made to SY/T0319. Meanwhile, the product is qualified after no foaming, no rusting, no cracking and no falling off, and otherwise, the product is unqualified.
Salt spray resistance (1000 h): reference is made to GB/T1771. Meanwhile, the product is qualified after no foaming, no rusting, no cracking and no falling off, and otherwise, the product is unqualified.
Solvent resistance: reference is made to the GB/T9274A process in which an acid resistant solvent: 5wt% H 2 SO 4 (25 ℃,720 h); alkali resistant solvents: 5wt% NaOH (25 ℃ C., 720 h) resistant; salt-tolerant solvents: 5wt% NaCl (25 ℃ C., 720 h). Meanwhile, the product is qualified after no foaming, no rusting, no cracking and no falling off, and otherwise, the product is unqualified.
Performance test data
TABLE 1
Figure BDA0004073940870000091
/>

Claims (10)

1. A thick coating type water-based epoxy paint for a storage tank is characterized by comprising the following components: a component A and a component B; the component A comprises the following components in percentage by weight: 28-43wt% of water-based epoxy resin, 0.8-2wt% of dispersing agent, 0.3-1.0wt% of defoaming agent, 0.5-1.0wt% of anti-settling agent, 0.3-0.6wt% of silane coupling agent, 0.3-0.6wt% of wetting agent, 23-42wt% of pigment, 4-8wt% of filler, 18-22wt% of conductive mica powder and the balance of cosolvent;
the component B comprises the following components: 15-35wt% of aqueous epoxy curing agent, 4-10wt% of flash rust inhibitor and the balance of deionized water.
2. The thick coating type water-based epoxy paint for the storage tank, as claimed in claim 1, wherein the weight ratio of the component A to the component B is (2.5-5): 1.
3. the thick coating type aqueous epoxy paint for a storage tank according to claim 2, wherein the average epoxy equivalent of the aqueous epoxy resin is 400-600g/mol, and the average viscosity of the aqueous epoxy resin is 2000-14000 mPa-s.
4. A thick coating type aqueous epoxy paint for storage tanks according to claim 3, characterized in that the active hydrogen equivalent of the aqueous epoxy hardener is 130-180g/mol, and the solid content of the aqueous epoxy hardener is 50-80wt%.
5. The thick coating type water-based epoxy paint for the storage tank as claimed in claim 1 or 4, wherein the weight ratio of the water-based epoxy resin to the pigment to the conductive mica powder is 1: (0.6-1.2): (0.5-0.8).
6. A method for preparing the thick coating type water-based epoxy paint for the storage tank according to any one of claims 1 to 5, comprising the following steps:
s1, adding part of aqueous epoxy resin into a cosolvent, dispersing at a low speed, sequentially adding a dispersing agent, a defoaming agent, an anti-settling agent, a wetting agent, pigment and a silane coupling agent, uniformly stirring, and grinding to obtain a mixture 1;
s2, adding the residual water-based epoxy resin and the conductive mica powder into the mixture 1, uniformly dispersing, adding the filler, and continuously and uniformly dispersing to obtain a component A;
s3, adding the aqueous epoxy curing agent into deionized water, stirring and dispersing at a low speed, and then adding the flash rust inhibitor, and dispersing uniformly to obtain a component B;
s4, uniformly mixing the component A and the component B.
7. The method for preparing a thick coating type water-based epoxy paint for a storage tank according to claim 6, wherein the weight percentage of the water-based epoxy resin is 3-20wt%.
8. The method for preparing a thick coating type water-based epoxy paint for a storage tank as claimed in claim 7, wherein the fineness of the grinding is 20-40 μm.
9. The use of a thick coating type water-based epoxy paint for a storage tank according to claim 1, wherein,
as an anti-corrosive coating applied to the inner wall of the tank.
10. The use of a thick coating aqueous epoxy paint for tanks according to claim 9, characterized in that the thickness of the anti-corrosive coating is 250-350 μm.
CN202310103357.1A 2023-02-13 2023-02-13 Thick coating type water-based epoxy paint for storage tank and preparation method and application thereof Pending CN116082920A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102533061A (en) * 2011-12-30 2012-07-04 洛阳七维防腐工程材料有限公司 High-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint and preparation method thereof
CN103013293A (en) * 2012-12-21 2013-04-03 天津美士邦涂料化工有限公司 High-heat-resisting and anti-corrosive paint and application thereof
CN103275596A (en) * 2013-03-29 2013-09-04 厦门双瑞船舶涂料有限公司 Light-color modified epoxy static conductive anticorrosion coating and preparation method thereof
CN112375463A (en) * 2020-11-27 2021-02-19 沈阳化工研究院有限公司 Environment-friendly high-solid-content heavy-duty anticorrosive paint for inner wall of storage tank and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102533061A (en) * 2011-12-30 2012-07-04 洛阳七维防腐工程材料有限公司 High-solid-content superhigh-corrosion-resistant water-based epoxy static conductive paint and preparation method thereof
CN103013293A (en) * 2012-12-21 2013-04-03 天津美士邦涂料化工有限公司 High-heat-resisting and anti-corrosive paint and application thereof
CN103275596A (en) * 2013-03-29 2013-09-04 厦门双瑞船舶涂料有限公司 Light-color modified epoxy static conductive anticorrosion coating and preparation method thereof
CN112375463A (en) * 2020-11-27 2021-02-19 沈阳化工研究院有限公司 Environment-friendly high-solid-content heavy-duty anticorrosive paint for inner wall of storage tank and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
崔灿灿;王磊;刘浩亮;郭晓军;韩忠智;段绍明;丁超;张其滨: "水性环氧防腐涂料研究", 表面技术, no. 012, pages 18 - 22 *

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